Apparatus for



J. R. MACK June 24, 1930.

APPARATUS FOR APPLYING FILMS OF FLUID MATERIALS TO SURFACES Filed Feb. 29, 1928 3 SheetsSheet l ATTORNEY June 24, 1930. J, R. MACK 1,768,485

APPARATUS FOR APPLYING FILMS OF FLUID MATERIALS TO SURFACES Filed Feb. 29, 1928 v 5 Sheets-Sheet 2 INVENTOR 762/7 E /%7c,.

ATTORNEY June 24,1930. J, RMA-CK '1 ,'768 ,485.

APPARATUS FOR APPLYING FILMS OI FLUID IATERIALS T0 SURFACES 'Fiiled Feb. 29, 192E; s Sheets-Sheet 3 ATTORNEY Patented June 24, 1930 UNITED STATES- r T EN'T oFFic 1 Join: B. MAoK, or cALnwELL, NEW JERSEY, AssIcNoE ro QUIGLEY EumIAcE SPECIALTIES coMrANY, Inc, A comoaarion or NEW- YORK.

APPARATUS FOR APPLYING F rms or rLnrn MATERIALS 'ro SURFACES Application filed Februar 29, 1928. Serial No.257,874.

This invention relates to means for-covering surfaces with continuousfilms of materials such as asphalt which are fluid only at temperatures. above that of the atmosphere. The present invention embodies means for handling the bituminous material while so hot as to be sufliciently'fluid and projecting it against the surface to be covered in sheet or jet form.

' The best form of my invention at present known to me is illustrated in the accompanyingthree sheets of drawings in which Fig. 1 is a perspective view of the apparatus looking at the rear end thereof.

Fig. 2 is a similar view looking at the front end. I

Fig. 3 is ageneral vertical section taken approximately on line 3-3 of Fig. 4, with a portion of cylinder 11 broken away and shown in section on a central vertical plane.

'Fig. 4 is a plan view with the top removed and parts broken away.

Throughout the drawings like reference characters indicate like parts.

1 is an outer casing made-of heavy sheet I iron or light steel plates supported on vehicle wheels .2, by means of the drop axle 2 A handle 8 extends from the rear of the machine by which it may be dragged or pushed around, and 4: is any convenient vertical strut, the lower end of whichyrests upon; the ground and maintains the apparatus in substantially horizontal position when at rest. V T

5 represents generally an oil or gas burner set in a port opening '6 at the rear of the casing, so that the flame of the burner will be projected into the lower part of said casing. Fuel is supplied to this burner through the connection 7 from the fuel tank 8, supported fromthe handles 3.

9 is a discharge hose connected to the front end of a cylinder 11, supported in a horizontal position in the interior of easing 1, by means of curved cross straps 40, 40, or equivalent fastenings. 12 is a piston movable freely in cylinder 11 under the action of fluid pressure applied to either side thereof. 35 is a hose connected to piping 10 for delivering compressed air or other fluid under pressure from any suitable source of supply, not shown. and connected to a system of piping in the interior of casing 1, having a rearbranch 13, communicating with the rear end of cylinder '5 11, through port 13 and controlled by valve 14, and-also a forward'bra-nch 15, controlled by valve 16, andconnected to a discharge tube 17, opening into the front end of cylinder 11 and serving as a connection therefrom to hose 9. As shown, the compressed air pipe branch 15 is' connected to tubel7 by an angle union 18. i I I 19 is an air pressure gauge mountedon the compressed air-piping; 20 isa safety blowoff valve thereon and 21 is a connection from tube 17 for a thermometer, not shown, by which the temperature of the fluid in the tube 17 can be determined. 1 if 22 is a shutofl' valve in tube 17 ,and' 23 is an exhaust tube connection opening out of the rear end of the'cylinder 11 and cons trolled by valve 24. A funnel 25 is connected to thefront end of cylinder 11 by conduit 26 which latter islcontrolled by the shutoff valve 27, operated by lever 88,'by a train of .rack and pinion gearing '(n'ot shOWn).

By means of the apparatus so far d escribed, the cylinder llcan be charged With hot fluid asphalt in the following manner:

Valves 22 and 14 are closed and valves 16 and 24 opened-to admit compressed air to the front end of the cylinder and forceithe piston 12 back, the airtrapped behind it escaping through exhaust pipe 23. Valve 16 is then closed to shut off the compressed air-and valve 22 may also remain'closed'. Valve 27 is then opened" and hot liquid asphalt poured in through conduit "26 and funnel 25 until the front of the cylinder *llis filledwith it. Valve 27 is then closed.

To eject the asphalt through the discharge hose 9, valve 24 is closed and valve "14 opened, admitting compressed air behind '65 piston '12, and driving it slowly forward SO as to expel the charge of hot asphalt in front of it, val-ve'22 beingalso open.

While in operation the entire mechanism within the casing 1 should be'kept 'hot by '100 flame from burner projected under the apparatus in the casing and preferably a horizontally disposed baffle plate 39 1s arranged over this flame so as to distribute the heat from it more uniformly throughout the casing interior. When the charge of hot asphalt in the cylinder has been expelled it is filled again by manipulating the valves as first above described.

To clean out the cylinder 11 at any time and free it of foreign matter accumulated therein, the valve 30 on blowout pipe 29 connected to cleanout port 28 in the bottom of cylinder 11 may be opened. The piston 12 is forced all the way back so as to connect said port with the front portion of the cylinder and compressed air is forced through the cylinder by opening valve 16 and closing valve 22.

One great difficulty in handling hot asphalt or other bituminous material in any such jet producing apparatus as above de scribed, has arisen from the tendency of the asphalt to solidify in the discharge hose when the latter is cold on starting up the apparatus, or when it is allowed to cool after use. In my invention I overcome this difiiculty by providing another compressed air branch 31 connected to one end of the heating coil 32, located in the interior of casing 1, and havingits other end connected to the discharge tube 17 by the T-connection 34, this discharge connection being controlled by the valve 33. When the apparatus is to be started up the casing interior is first heated by flame from the burner 5 which also heats the piping 32 and then, on opening valve 33, hot air is driven out through the tube 17 and hose 9, preheating the same and also melting and discharging any asphalt remaining therein from previous operations. Similarly, if, during ordinary use of the apparatus the asphalt tends to chill in the hose, the latter can be reheated by stopping operation of the ejecting apparatus and applying hot air as above described to the conduit interior. Also, after each period of use hot air may be thus blown through the hose to clear it of any asphalt films which would otherwise be left therein.

5 is a trough located under the burner 5 and inclined downward and outwardly :(best shown in Fig. 1) so that any dripping oil is discharged on the ground and not allowed to run into the interior of the casing 1.

Imay also provide a tank 36 for holding carbon tetrachloride or other fire extinguishing fluid, from which tank a pipe 37, controlled by valve 38, leads to the casing interior and discharges on top of the baffle 39.. By opening valve 38 at any time the interior can then be flooded with carbon tetrachloride to extinguish any excess of combustion which may havestarted therein as from an excess of oil being inadvertently discharged into the casing.

41, 41, are openings in the top of casing 1 to permit the hot gases generated by the combustion of the oil to escape from the casing.

While I have shown the cylinder 11, with reciprocating piston 12 reciprocated therein by compressed air, as an element in the present embodiment of my invention, it is evident that other forms of power or hand driven apparatus for ejecting the hot asphalt or other fluid material might be substituted for such specific form of ejector. 7

Among other advantages of my invention may be mentioned the following: Heating the ejector apparatus produces 'greater fiuidity of the discharged material, thereby facilitating its handling and heightening its power of adhesion to the surface against which it is projected. The passing of hot air through the discharge hose before and after using not only prevents clogging by congealed material, but also prolongs the useful life of the hose, as the deposit of even thin films of cold asphalt on theinterior surface of a hose renders it liable to fracture when coiled up or uncoiled or otherwise bent in subsequent handling.

Various changes could be made in the details of the apparatus shown and described without departing essentially from the method and principles of operation above explained as novel and useful features of the invention.

A thermometer may also be set on the casing 1, as shown at 50 in Fig. 1, so as to register the temperature in the interior of said casing.

While my invention finds its most useful application to materials which need to be heated to preserve their fluidity, it may also be used, of course, on other materials, such as emulsified asphalt or paint which do not require heating. In the latter case the discharge hose may be cleaned out with either hot or cold ompressed air, if necessary.

Having described my invention, I claim:

In a portable device for spraying hot asphalt on surfaces to be covered by an asphalt film, hicle wheels for supporting said casing, a cylinder having a free piston therein mounted in said casing, a discharge hose connection and a valve controlled inlet connection adapted to convey hot asphalt, both communicating with one end of said cylinder, a compressed air connection to each end of said cylinder, a fluid fuel burner located in the lower part of said casing, a bafiie plate between said burner and said cylinder, a tank for fluid fuel supported on said, casing and connected to said burner and an air heater located in said casing, exposed to the heat generated by said burner,

the combination of a casing, ve-

and connected to said discharge hose and compressed air connections, together with suitable valves controlling said compressed air connections; whereby said piston may be forced to the end of the cylinder remote from the dischar e hose connection, the cylinder filled with uid asphalt, and the movement of the piston reversed to expel said asphalt, through said hose, or hot air forced through said hose to melt and expel any asphalt therein.

JOHN R. MACK. 

